Arduino additional input pins – Multiplexer

One of the limitations of Arduino is the fixed number of input pins available on the boards. Using a multiplexer it is possible to get Arduino additional input pins by using the digital output pins. I brought this multiplexer from sparkfun (16-Channel Analog/Digital Multiplexer/Demultiplexer CD74HC4067) for $5 conveniently on a breakout board. It works by connecting …

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